-6531 -6541
V Guide SystemsMetric Size 70° Type Wheels and Bushings / Double Sided Tracks
QFunctions and Features1. Bearing and V groove (70°) are integrated in a single unit.
2. System construction can be achieved by using only one Double
Sided Track.
3. Sized in metric.
V Guide Systems - OverviewMetric Size 70° Type
Q App. Example
Base Plate
Double Sided TrackCarriage
Q Basic Structure
Track
Fixed Wheel
Fixed Wheel
Hexagon Nut
Tightening Nut
Adjusting Wheel
Adjusting WheelTrack Mounting Hole
Part Number - Spec. - L
MVH12MVRS25
- C- 510
Q Load CalculationL = Load (N)LS = Thrust load applied to wheel (N)LR = Radial Load applied to wheel (N)A, B = Distance (mm)
When load applied between the wheels LxBLS1= A+BLS2=L-LS1
(Ex.) L=500 (N) A=40 (mm) B=60(mm)
500x60LS1= =300(N) 40+60
LS2=500-300=200(N)
BAL
LS1 LS 2
LR LR
When load applied outside the wheels LxALS1= BLS2=L+LS1
(Ex.) L=500 (N) A=60 (mm) B=40(mm) 500x60LS1= =750(N)
40LS2=500+750=1250(N)
LRLR
LS 2
B LS 1AL
When radial and thrust load are combined LxALS1=LS2=
BLR1=L+LS1
LR2=LS2
(Ex.) L=500 (N) A=60 (mm) B=100(mm)
500x60LS1=LS2= =300(N) 100
LR1=500+300=800(N)
2LRLR1
L
A
B
B/2
LS 1
2LS
QSystem Assembly and Adjustments1. First, assemble the components loosely with a minimum load.
2. Fully tighten the fixed wheels.
3. Next, tighten mounting nuts of adjusting wheel tentatively in order to adjust them.
4. Turn the hex nut in the center of Adjusting Wheel gradually by wrench to set the minimum preload,
and do not leave a gap between each pair of wheels facing each other.
5. Check if proper preload is applied by turning the wheels with fingers while track is fixed and
carriage plate remains still. Although a slight resistance may be felt, the wheels should turn freely
under a proper preload. Excessive preload results in a shorter product life.
6. Make adjustments and test all the adjustable wheels in the above manner, and fully tighten the
wheel nuts to the specified torque.
7. After adjustment, check again in the same process as 5 to make sure of proper preload.
Q�Millimeter Size 70° Type Wheels and Bushings
Q�Millimeter Size 70° Type Double Sided Tracks
D±0.
025
E
70°
B CB1±0.02 K
M M1
M2
J
L
A
N
O 0-0.03
P
E (Adjustable) C (Fixed)
Type MMaterial HSurface Hardness Seal Operating Temp.MVHMVHL SUJ2 Equivalent
58~62HRC
No.12 Nitrile Rubber
-20°C~120°CNo.
25 34 Metal Shield
MVHSMVHSL SUS440C Equivalent Nitrile Rubber
LP±0.2
dG Counterbore Depth h
N±1.0 N±1.0
W
D+0.
050
C±0.
025
(W)
H
FH1
J
EW1 is the dimension at the intersection of 70°. (Both ends are R machined.)ETolerance C±0.025 is applicable to MVRS only.
W1
DC ±
0.02
5
H
FH1
J
70°
+0.
050
Type MMaterial sSurface Treatment HHardnessDouble Sided
TracksMVR SUJ2 Equivalent Black Oxide 58 ~ 62 HRC (70° Edge)MVRS SUS420J1 Equivalent - 52HRC (70° Edge)
L (Selection)Unit Price
MVR12 MVRS12120 165210 255300 345390 435480 525570 615660 705750 795840 885930 975
1020
L (Selection)Unit Price
MVR25 MVRS25 MVR44 MVRS44240 330420 510600 690780 870960 1050
1140
ENo adjusting hexagon groove (L) for adjusting wheel (E) No.12. EThrust load and radial load values are those when lubricated. For values when not lubricated, see P.653.
Part Number C=Fixed E =
Adjustable
Applicable Rail No. A B B1 C D E M M1 M2 J K L N
Eccentricity O PTightening
Torque N•m
Thrust LoadLSmax.
(N)
Radial LoadLRmax.
(N)
Unit Price
Type No. MVHMVHL
MVHSMVHSL
MVHMVHS(C Dimension Short)
12 C 12 12.7 10.1 5.47 5.8 9.51 5 M4x0.5 7 9 0.8 2 - - 4 7 2 22.5 45E 0.5
25 C 25 25 16.6 9 9.8 20.27 10 M8x1.0 13 17 1 5 3 - 8 13 18 100 200E 0.75
34 C 44 34 21.3 11.5 13.8 27.13 12 M10x1.25 17 21 1.25 6 4 - 10 15 33 200 400E 1.0
MVHLMVHSL(C Dimension Long)
12 C 12 12.7 10.1 5.47 9.5 9.51 5 M4x0.5 7 9 0.8 2 - - 4 7 2 22.5 45E 0.5
25 C 25 25 16.6 9 19 20.27 10 M8x1.0 13 17 1 5 3 - 8 13 18 100 200E 0.75
34 C 44 34 21.3 11.5 22 27.13 12 M10x1.25 17 21 1.25 6 4 - 10 15 33 200 400E 1.0
QLoad Factor CalculationCalculate the load factor (LF) of the wheel to which the biggest load is applied.Select the wheel whose load factor is less than 1.
LS LRLF= + LS max LR max
LF = Load FactorLS = Thrust Load applied to wheelLS max = Maximum Thrust Load applied to wheelLR = Radial Load applied to wheelLR max = Maximum Radial Load applied to wheel
Part Number W/o Lubrication With Lubrication
Type No. LSmax(N) LRmax(N) LSmax(N) LRmax(N)
MVHMVHSMVHL
MVHSL
12 22.5 45 60 12025 100 200 320 60034 200 400 800 1400
Calculate life of the system and confirm the validation of size selection.
LCLife (km) = xAf (LF)3
LF= Load FactorLC= Basic LifeAf = Adjustment Coefficient
Part Number LC Basic Life kmType No.
MVHMVHSMVHL
MVHSL
12 5025 7034 100
QLife Calculation
<Calculation Example>When using MVH-34C under the conditions of LS=100 (N), LR=200 (N) and Af=0.7
100 200Load Factor LF= + =0.268≤1.0800 1400
100Life (km)= x0.7=3637km (0.268)3
Af = Adjustment Factor Application Conditions1.0-0.7 Clean, Low Speed, Low Shock, Light Load0.7-0.4 Medium Level Contamination, Medium Level Shock, Medium Load, Vibration0.4-0.1 Severe Contamination, High Level Acceleration, Heavy Load, Vibration, High Cycle
Part NumberL Selection * (W) W1 F H H1 C J D dxGxh N P
Type No.
MVR12 120~1020 12 13.25 3.2 6.4 1.8 8.9 1.7 4 3.5x6.2x3.1 15 4525
240~114025 26.58 4.93 10.2 2.5 15.4 2.6 6 5.5x10x5.1 30 90
44 44 45.58 6.42 12.7 3 26.4 2.3 8 7x11x6.1 30 90
MVRS12 120~1020 12 12.37 3 6.2 1.8 8.5 1.7 4 3.5x6x3 15 4525
240~114025 25.74 4.5 10 2.5 15 2.5 6 5.5x10x5 30 90
44 44 44.74 6 12.5 3 26 2.5 8 7x11x6 30 90E* For L dimensions, please refer to the price list.